Bradshaw, D.J. and Newell, A. Sulfidisation Process and Apparatus for Enhanced Recovery of Oxidised and Surface Oxidised Base and Precious Metal Minerals. National Phase Patent Application United States 12/524,926.

Bradshaw, D.J. and Newell, A. The Application of Sulfidisation for the Recovery of Oxidised and Surface Oxidised Base and Precious Metal Minerals. National Phase Patent Application South Africa 2009/03361.